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Finding the Fourth Proportional to 339,987.70, 509,981.55 and 162,840.70

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Solution

The fourth proportional to 339,987.70, 509,981.55 and 162,840.70 is: 244,261.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,987.70 : 509,981.55 = 162,840.70 : x
  2. Step 2: Convert to fraction form
    339,987.70/509,981.55 = 162,840.70/x
  3. Step 3: Cross multiply
    339,987.70x = 509,981.55 × 162,840.70
  4. Step 4: Simplify right side
    339,987.70x = 83,045,752,589.09
  5. Step 5: Solve for x
    x = 83,045,752,589.09/339,987.70
  6. Step 6: Final answer
    x = 244,261.05

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.